Communication terminal accommodating apparatus and communication terminal accommodating method

ABSTRACT

In a communication terminal holding apparatus  101 , the control right of communication in a direct link type network is acquired by a control right acquiring section  205 . After acquiring the control right, a first scheduling section  203  assigns communication resources to a terminal apparatus in the direct link type network. A second scheduling section  204  cooperates with a first scheduling section  203  so as not to allow any competition or collision of communication resources in the communication between the direct link type network and the master-slave type network and assigns communication resources to a terminal apparatus in the master-slave type network. Owing to this, it is enabled to use a slave terminal apparatus in a master-slave type network as it is in a network integrated with a direct link type network.

TECHNICAL FIELD

The present invention relates to a communication terminal holdingapparatus and a communication terminal holding method in a wirecommunication system and a mobile communication system, and moreparticularly, to a communication terminal holding apparatus and acommunication terminal holding method which enable a slave terminalapparatus in a master-slave type network to be used as it is when thesame is integrated with a direct link type network.

BACKGROUND ART

In multimedia interface for which the needs has been sharply increasedrecently, a high speed and large capacity data transmission undervarious user circumstances, such as in public, office, home and thelike, is desired. As one of multimedia interfaces which provide suchhigh speed and large capacity data transmission, a high speed wirelessaccess network, a high speed radio access network or the like is gettingthe focus of public interest.

As examples of typical structures of such networks, there are amaster-slave type network and a direct link type network. In themaster-slave type network, by means of a central control via acommunication terminal holding apparatus, a plurality of terminalapparatus carry out communication with the communication terminalholding apparatus. On the other hand, in the direct link type network,by means of a central control via a communication terminal holdingapparatus, which has the control right in one or more communicationterminal holding apparatus, a plurality of terminal apparatus and othercommunication terminal holding apparatus carry out communicationsrespectively.

A master-slave type network shown in FIG. 1 comprises a communicationterminal holding apparatus 11 which has an access point (AP) facilityequivalent to a base station apparatus in a mobile communication system,and MT device apparatus 12, 13 and 14 having a mobile terminal (MT)facility respectively, which is equivalent to mobile station apparatusof a portable telephone apparatus or the like. In the master-slave typenetwork, the communication terminal holding apparatus 11 carries out ascheduling in which communication resources such as time area andfrequency or the like are assigned, and the communications between theMT device apparatus is made by surely being interposed by thecommunication terminal holding apparatus 11. For example, in a casewhere the MT device apparatus 12 carries out a communication with the MTdevice apparatus 14, the MT device apparatus 12 transmits a signal tothe communication terminal holding apparatus 11 in accordance with thescheduling by the communication terminal holding apparatus 11.

A direct link type network shown in FIG. 2 comprises CC/WT deviceapparatus 21 and 22, which have a central controller (CC) facility and awireless terminal (WT) facility, and WT device apparatus 23 and 24,which have a WT facility only, and communication is made directlybetween the WT device apparatus. Herein, the control right istransferred periodically between the CC/WT device apparatus 21 and 22,which have the CC facility respectively, and the apparatus having thecontrol right carries out the scheduling. For example, when the CC/WTdevice apparatus 22 makes a request for a communication with the WTdevice apparatus 24 at a point of time when the CC/WT device apparatus21 has the control right, the CC/WT device apparatus 21 carries out thescheduling in which communications resources such as time area andfrequency or the like are assigned.

Since each MT device apparatus carries out data communication only tothe communication terminal holding apparatus, the master-slave typenetwork has such merit that the MT device apparatus has a simplestructure. On the other hand, since the data communication is carriedout directly between the WT device apparatus without being interposed byany other apparatus, the direct link type network has such a merit thatthe communication resources can be utilized effectively.

As the field of the network application expands, such needs that the MTdevice apparatus used in the master-slave type network is desired to usealso in the direct link type network are raised. As one of the methodsto meet the needs, such a method that, as shown in FIG. 3, a terminalapparatus 31, in which a WT facility is added to a MT facility isintroduced, has been proposed conventionally.

However, in this method, such problems reside therein, i.e., an MTdevice, which is conventionally used, can not be used as it is and thesize of the terminal apparatus becomes larger resulting in eliminationof the merits of the master-slave type network. Also another problemsuch that MT device apparatus (MT device apparatus 13, 14 in FIG. 3),which are not provided with the MT facility, can not be used in a directlink type network resides in.

DISCLOSURE OF INVENTION

An object of the present invention is to provide a communicationterminal holding apparatus and a communication terminal holding methodthat enable an MT device apparatus to be used as it is in a network inwhich a direct link type network and a master-slave type network areintegrated with each other.

The forgoing object can be achieved in such manner that a communicationterminal holding apparatus having the respective facilities of CC/WT/APcarries out communication resource assignment to the respective networksso as not to allow any competition or collision thereof after acquiringthe control right of a direct link type network.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a block diagram showing a constitution of a master-slave typenetwork;

FIG. 2 is a block diagram showing a constitution of a direct link typenetwork;

FIG. 3 is a block diagram showing a network in which a conventionalmaster-slave type network and a direct link type network are integratedwith each other;

FIG. 4 is a block diagram showing a configuration of a network using acommunication terminal holding apparatus according to a first embodimentof the present invention;

FIG. 5 is a block diagram showing a configuration of a communicationterminal holding apparatus according to the first embodiment of thepresent invention;

FIG. 6 is a block diagram showing a first internal configuration of acontrol right acquiring section of the communication terminal holdingapparatus according to the first embodiment of the present invention;

FIG. 7 is a flow sheet illustrating a first control right acquiringoperation of a control right acquiring section of the communicationterminal holding apparatus according to the first embodiment of thepresent invention;

FIG. 8 is a block diagram showing a second internal configuration of acontrol right acquiring section of the communication terminal holdingapparatus according to the first embodiment of the present invention;

FIG. 9 is a flow sheet illustrating a second control right acquiringoperation of the control right acquiring section of the communicationterminal holding apparatus according to the first embodiment of thepresent invention;

FIG. 10 is a sequence sheet illustrating an operation of thecommunication terminal holding apparatus according to the firstembodiment of the present invention;

FIG. 11 is a block diagram showing a configuration of a communicationterminal holding apparatus according to a second embodiment of thepresent invention;

FIG. 12 is a block diagram showing a configuration of a communicationterminal holding apparatus according to a third embodiment of thepresent invention;

FIG. 13 is a sequence sheet illustrating an intermittent operation of CCand AP facilities before detecting an MT device apparatus by thecommunication terminal holding apparatus according to the thirdembodiment of the present invention;

FIG. 14 is a sequence sheet illustrating an intermittent operation of CCand AP facilities when the MT device apparatus is made to leave from thenetwork by the communication terminal holding apparatus according to thethird embodiment of the present invention; and

FIG. 15 is a sequence sheet illustrating an intermittent operation of CCand AP facilities at no-response of the MT device apparatus made by thecommunication terminal holding apparatus according to the thirdembodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Now, embodiments of the present invention will be described below withreference to accompanying-drawings

(First Embodiment)

FIG. 4 is a block diagram showing a configuration of a network, in whicha direct link type network and a master-slave type network areintegrated with each other, using a communication terminal holdingapparatus according to a first embodiment of the present invention.

The network shown in FIG. 4 comprises a communication terminal holdingapparatus 101 that has a central controller (CC) facility, a wirelessterminal (WT) facility and an access point (AP) facility; a CC/WT deviceapparatus 102 that has a CC facility and a WT facility; WT deviceapparatus 103 and 104 that have a WT facility only and MT deviceapparatus 105 and 106 that have a mobile terminal (MT) facility only.

In the communication terminal holding apparatus 101, the CC facility inthe direct type network and the AP facility of the master-slave typenetwork are adapted so as to operate together. Also, the CC facility isadapted so as to operate after acquiring the control right ofcommunication from the terminal apparatus 102, which has CC/WTfacilities, when the communication terminal holding apparatus 101 is inservice.

The communication terminal holding apparatus 101 is mainly constitutedof, as shown in the block diagram in FIG. 5, a DL (direct link type)interface section 201, an MS (muster-slave type) interface section 202,a first scheduling section 203, a second scheduling section 204, acontrol right acquiring section 205 and a control right holding section206.

The DL interface section 201 carries out data communication with the WTdevice apparatus 102, 103 and 104 in the direct link type network. TheMS interface section 202 carries out data communication with the MTdevice apparatus 105 and 106.

The control right acquiring section 205 and the control right holdingsection 206 are for providing the CC facility; when the control right isnot held by the control right holding section 206, the communicationterminal holding apparatus 101 acquires the control right in the directlink type network via the control right acquiring section 205.

The first scheduling section 203 is for providing the WT facility; afterobtaining the control right, the communication terminal holdingapparatus 101 carries out a first scheduling in which communicationresources are assigned to the WT device apparatus 102, 103 and 104 inthe direct link type network and to the own terminal apparatus (WT) 101via the first scheduling section 203.

The second scheduling section 204 is for providing the AP facility; thecommunication terminal holding apparatus 101 carries out a secondscheduling in which communication resources are assigned to the MTdevice apparatus 105 and 106 in the master-slave type network and to theown apparatus (AP) 101.

Further, the communication terminal holding apparatus 101 mediates so asnot to allow any competition or collision of the communication resourcesin the communication between the direct link type network and themaster-slave type network by means of cooperation of the firstscheduling section 203 and the second scheduling section 204.

FIG. 6 is a block diagram showing a first internal configuration of thecontrol right acquiring section 205 of the communication terminalholding apparatus 101 according to the first embodiment of the presentinvention. As shown in FIG. 6, the control right acquiring section 205is constituted mainly of an own apparatus confirming section 301, acontrol right inquiring section 302, a control right request section 303and a control right obtaining section 304.

The own apparatus confirming section 301 confirms whether the controlright is presently held by the control right holding section 206 or not,i.e., whether the own apparatus has the control right or not. Thecontrol right inquiring section 302 inquires to the network which CC/WTdevice apparatus has the control right of the direct link type networkpresently. The control right request section 303 requests the controlright to a CC/WT device apparatus which has the control right. Thecontrol right obtaining section 304 acquires the control right from theCC/WT device apparatus to which the request for the control right ismade.

The control right acquiring operation in the control right acquiringsection 205 is performed in accordance with the flow sheet shown in FIG.7. First of all, at step (hereinafter, abbreviated to “ST”) 401, the ownapparatus confirming section 301 operates to confirm whether the ownapparatus has the control right or not. At this time, when the ownapparatus has the control right, the processing is terminated.

On the other hand, when the own apparatus does not have the controlright, at ST402, the control right inquiring section 302 operates tomake a notice of inquiry which CC/WT device apparatus has the controlright presently onto the network via the first scheduling section 203.The inquiry for the control right is made to the upper layer. Therespective CC/WT device apparatus, which has received the notice ofinquiry for the control right from the upper layer, makes a notice of aresponse to the inquiry onto the network. And, the control rightacquiring section 205 obtains information (inquiry result), i.e., whichapparatus has the control right presently. The inquiry step descriedabove is for just an example; for example, a step, in which apredetermined request data is transmitted without being interposed byany other layer, may be adopted.

Then, at ST403, the control right request section 303 operates to make arequest to an apparatus, which has the control right presently, based onthe inquiry result to transfer the control right. This request is madeto the upper layer. The CC/WT device apparatus, which has the controlright, receives the notice requesting the control right from the upperlayer. The step described above is for an example only; for example, astep, in which a predetermined request data is transmitted without beinginterposed by any other layer or the like, may be used.

Then, at ST404, the control right obtaining section 304 operates toobtain the control right from the CC/WT device apparatus which has thecontrol right, and holds the control right in the control right holdingsection 206, and the processing is terminated.

FIG. 8 is a block diagram showing a second internal configuration of thecontrol right acquiring section 205 of the communication terminalholding apparatus 101 according to the first embodiment of the presentinvention. In FIG. 8, the components, which are common to those in FIG.6, are given with the same reference numerals as in the FIG. 6, and thedescription thereof will be omitted.

The control right acquiring section 205 shown in FIG. 8 is, compared toFIG. 6, structured so that the control right inquiring section 302 iseliminated there from, and a list 501 of the apparatus belonging to thenetwork, a list retrieving section 502 that retrieves on the list whichCC/WT device apparatus has the control right of the direct link typenetwork presently and a list renewing section 503 that renews the list401 are added thereto.

In the list 501, the apparatus (CC/WT device apparatus only is alsoavailable) belonging to the network are registered while being coupledwith information that indicates whether the apparatus has the controlright presently or not. The control right acquiring section 205 shown inFIG. 8, controls the information concerning the apparatus which has thecontrol right presently via the list 501.

The control right acquiring operation in the control right acquiringsection 205 is performed in accordance with the flow sheet shown in FIG.9. First of all, at ST601, the own apparatus confirming section 301operates to confirm whether the own apparatus has the control right ornot. At this time, when the own apparatus has the control right, theprocessing is terminated.

On the other hand, when the own apparatus does not have the controlright, at ST602, the list retrieving section 502 operates to retrievewhich apparatus has the control right presently from the list 501.

Then, at ST603, the control right request section 303 operates to make arequest, based on the retrieval result of the list retrieving section502, to the apparatus which has the control right presently to transferthe control right.

Then, at ST604, the control right obtaining section 304 operates toobtain the control right from the CC/WT device apparatus which has thecontrol right presently, and holds the control right in the controlright holding section 206.

Further, on a parallel with ST604, at ST605, the list renewing section503 operates to renew the list of the apparatus having the control rightwith the latest information. In addition to the timing when the controlright is transferred, the list 401 is renewed as necessity arises orperiodically.

Then, referring to the sequence sheet shown in FIG. 10, an operation ofthe communication terminal holding method in the communication terminalholding apparatus 101 will be described. In FIG. 10, as an initialstatus, a direct link type network is constituted of a communicationterminal holding apparatus 101 and terminal apparatus 102, 103 and 104,and it is assumed that, in the terminal apparatus 102, a CC facilityoperates in the initial status.

The communication terminal holding apparatus 101, which is provided withthe respective CC/WT/AP facilities, operates the WT facility at a timingindicated by a reference numeral 701 immediately after the start (ON).

Next, the AP facility operates to retrieve the existence of MT 105 and106 at a timing indicated with a reference numeral 702. At the sametime, the control right acquiring section 205 is made to operate toacquire the control right of the direct link type network side, and theCC facility is also secured. The control right is acquired in aprocedure as described above. To be concrete, the communication terminalholding apparatus 101 makes a request for the control right to theterminal apparatus 102 having the control right, and acquires thecontrol right from the terminal apparatus 102.

Owing to this, at a timing indicated by a reference numeral 703, astatus, in which the first and the second scheduling sections 203 and204 are made to operate and a data communication between the MT deviceapparatus and the WT device apparatus can be carried out in the bothsides of the direct link type network and the master-slave type network,is achieved. As a result, since the communication terminal holdingapparatus 101 is enabled to carry out resource control on the MT deviceapparatus and the resource control on the WT device apparatus, it isenabled to carry out resource assignment evenly to the terminalapparatus held in the own apparatus.

In this state, when the MT device apparatus started up (ON), the MTdevice apparatus recognizes the existence of an AP and initiates anassociation (connection in application layer). In this case, since theMT transmits a control signal, the communication terminal holdingapparatus 101 detects the existence of the MT device apparatus at atiming indicated by a reference numeral 704, and carries out ascheduling of the data communication with the MT device apparatus at atiming indicated by a reference numeral 705. And, the communicationterminal holding apparatus 101 transmits the information subjected to ascheduling (scheduling information), to the MT device apparatus. The MTdevice apparatus carries out data transmission to the communicationterminal holding apparatus 101 in accordance with the receivedscheduling information. After that, in the same manner as describedabove, the MT device apparatus can be received within a range of the APfacility of the communication terminal holding apparatus 101.

Although as for the interface sections 201 and 202 shown in FIG. 5, eachone of direct type network and master-slave type network is provided, inaddition to the above, various modes of network are conceivable; thenumber thereof may be three or more in accordance with the size andcapacity of the communication terminal holding apparatus 101, anyconstitution, in which the control right acquiring sections 205corresponding thereto are provided, is acceptable.

As described above, according to the first embodiment, the MT deviceapparatus can be used as it is in a network in which a direct link typenetwork and a master-slave type network are integrated with each other,since the communication terminal holding apparatus 101 provided with therespective CC/WT/AP facilities is enabled to carry out, after acquiringthe control right of the direct link type network, a communicationresource assignment of each network so as not to allow any competitionor collision to occur.

However, when the communication terminal holding apparatus 102, which isprovided with the facilities of CC/WT, has the control right and assignscommunication resources, the direct link type network and themaster-slave type network can not be used evenly. The reason of this isthat, since the communication terminal holding apparatus 101 is also oneof the WT device apparatus when viewed from the communication terminalholding apparatus 104, and when sufficient communication resource isrequested at AP side from the communication terminal holding apparatus101, it is seemed as if communication resources which are available forseveral terminals at once were requested from one WT device apparatus.And the communication terminal holding apparatus 104, due to therelationship with the request from the other WT device apparatus, cannot always assign communication resources enough to satisfy the requestto the communication terminal holding apparatus 101.

Contrarily to this, when the communication terminal holding apparatus101 has the control right and assign the communication resource, sinceboth of the WT device apparatus and the MT device apparatus can be takeninto consideration, it is enabled to use the direct link type networkand the master-slave type network evenly.

(Second Embodiment)

FIG. 11 is a block diagram showing a configuration of a communicationterminal holding apparatus according to a second embodiment of thepresent invention. In a communication terminal holding apparatus 801shown in FIG. 11, the components, which are the same as those in thecommunication terminal holding apparatus 101 shown in FIG. 5, are givenwith the same reference numerals as those in FIG. 5, and the descriptionthereof will be omitted.

The communication terminal holding apparatus 801 shown in FIG. 11 isdifferent from the communication terminal holding apparatus 101 shown inFIG. 5 in a point that a terminal detecting section 802, which detectsthe MT device apparatus in the master-slave type network, is added.

The terminal detecting section 802 detects an MT device apparatus in themaster-slave type network via the MT interface section 202 and noticesthe result to the control right acquiring section 205 and the secondscheduling section 204.

Owing to this, although the control right is periodically transferredbetween the communication terminal holding apparatus in an ordinarydirect link type network, in the second embodiment, when a communicationrequest is made from an MT device apparatus the control right acquiringsection 205 can promptly get into an operation to acquire the controlright in the case where the control right holding section 206 does nothave the control right, and the second scheduling section 204 canpromptly perform second scheduling. Accordingly, it is enabled toshorten the time up to the start of data communication between the MTdevice apparatus and the WT device apparatus.

Although the terminal detecting section 802 is provided as a one foreither one of the networks, the terminal detecting section 802 may beprovided as a one for the respective networks depending on the variousmodes of the networks.

(Third Embodiment)

FIG. 12 is a block diagram showing a configuration of a communicationterminal holding apparatus according to a third embodiment of thepresent invention. In the communication terminal holding apparatus 901shown in FIG. 12, the components, which are the same as those of thecommunication terminal holding apparatus 801 shown in FIG. 11, are givenwith the same reference numerals as the FIG. 11 and the descriptionthereof will be omitted.

The communication terminal holding apparatus 901 shown in FIG. 12 isdifferent from the communication terminal holding apparatus 801 shown inFIG. 11 in a point that a detecting control section 902 is providedwithin the terminal detecting section 802.

The detecting control section 902 controls so as to secure the CCfacility by the control right acquiring section 205 and the firstscheduling section 203 and to perform the AP facility by the secondscheduling section 204 intermittently or periodically for a period oftime until the existence of an MT device apparatus is detected by theterminal detecting section 802.

For example, as shown in FIG. 13, for a period of time until theexistence of an MT is detected, the CC facility is secured and theoperation of the AP facility is performed in a period indicated by areference numeral 1001, and securing of the CC facility and the APfacility is suspended in the period indicated by a reference numeral1002. That is to say, the securing of the CC facility and the operationof the AP facility are made to perform intermittently or periodically.

As described above, according to the communication terminal holdingapparatus 901 of the third embodiment, when another terminal apparatushaving the CC/WT facilities or communication terminal holding apparatushaving CC/WT/AP facilities makes a request for the control right ontothe direct link type network, the communication terminal holdingapparatus 901 can allow the another terminal apparatus to carry out acommunication, since the communication terminal holding apparatus 901can suspend the CC facility to release the control right.

Also, for a period of time when the existence of an MT device apparatusis not detected, a waste of communication resources and powerconsumption can be reduced by suspending the AP facility.

In FIG. 13, although the CC facility is suspended for a period indicatedby the reference numeral 1002, unless particularly any request is madefrom other terminal apparatus, it is not always necessary to suspend theCC facility or to release the control right.

Also, although the detecting control section 902 is provided as a onefor either one of the networks, the detecting control section 902 may beprovided as a one for the respective networks depending on the variousmodes of the networks. Herein, in the various modes of the networks, anetwork of a radio LAN system or the like specified by IEEE802.11 isincluded.

Further, it is assumed that an MT device apparatus, which has completeda data communication, has left from a master-slave type network inoperation as indicated by a reference numeral 1101 in FIG. 14. In thiscase, assuming that the MT device apparatus is the only one terminalapparatus within the master-slave type network, the communicationterminal holding apparatus 901 having the CC/WT/AP facilities can obtainthe same effect as the forgoing initial status, by returning once, asindicated by a reference numeral 1102, to the initial status of the MTdevice apparatus detection in a period of time indicated by referencenumerals 1001 and 1002 in FIG. 13.

Furthermore, as indicated by a reference numeral 1201 in FIG. 15, in acase where an MT does not carry out data transmission or reception foralong period of time, or the MT gets into a state that a communicationis interrupted by some obstacle, the communication terminal holdingapparatus 901 having the CC/WT/AP facilities can obtain the same effectas the forgoing initial status by setting a specific time-outbeforehand, and by returning once, as indicated by a reference numeral1202, to the initial status of the MT device apparatus detection in aperiod of time indicated by reference numerals 1001 and 1002 in FIG. 13when the specific time-out has been exceeded.

Still further, as for the forgoing time-out setting, a specific fixedperiod of time is available, or taking into consideration the urgency orpriority of the communication, the time-out period may be determineddynamically.

Still furthermore, the detecting control section 902 may be adapted soas to control to make the detecting control section 902 and the secondscheduling section 204 operate intermittently or periodically at agradually multiplied cycle of communication frame timing.

Owing to the configuration described above, the control right acquiringand the second scheduling can be made to perform intermittently whilesynchronizing with the communication operation of the network.

Furthermore, the forgoing period of the time-out may be set inaccordance with the urgency of the communication of the MT deviceapparatus. Owing to the configuration, a wasteful communication controloperation for an MT device apparatus, of which communication urgency islow, can be reduced.

Still furthermore, the period of the time-out may be set in accordancewith the communication classification of the MT device apparatus. Owingto the configuration, a wasteful communication control operation for anMT device apparatus, which is classified in a specific communicationclass, can be reduced.

As demonstrated above, according to the present invention, it is enabledto use an MT device apparatus as it is in a network in which a directlink type network and a master-slave type network are integrated witheach other.

This application is based on the Japanese Patent ApplicationNo.2000-257902 filed on Aug. 28, 2000 and the Japanese PatentApplication No.2001-067171 filed on Mar. 9, 2001; entire contents ofwhich are expressly incorporated by reference herein.

INDUSTRIAL APPLICABILITY

The present invention is applicable to a wire communication system and amobile communication system in a network in which a direct link typenetwork and a master-slave type network are integrated with each other.

1. A communication terminal holding apparatus used for a network inwhich a direct link type network and a master-slave type network areintegrated with each other, said communication terminal holdingapparatus comprising: a control right acquiring section that specifiesan apparatus having control right when the communication terminalholding apparatus does not have the control right, requests a transferof the control right from the apparatus having the control right andacquires the control right of said direct link type network; a firstscheduling section that assigns communication resources to a terminalapparatus in said direct link type network after acquiring the controlright; and a second scheduling section that assigns communicationresources to a slave terminal apparatus in said master-slave typenetwork while cooperating with said first scheduling section so as notto cause any competition or collision of communication resources.
 2. Thecommunication terminal holding apparatus according to claim 1,comprising a detecting section that detects whether any communicationrequest is made or not from the slave terminal apparatus, wherein: thecontrol right acquiring section promptly enters into an operation toacquire the control right in a case where the control right acquiringsection does not have the control right when a communication requestfrom the slave terminal apparatus is detected by said detecting section;and the second scheduling section promptly enters into an operation toassign communication resources when a communication request from theslave terminal apparatus is detected by said detecting section.
 3. Thecommunication terminal holding apparatus according to claim 2,comprising a control section that controls to make the control rightacquiring section and the second scheduling section intermittentlyoperate when the communication request from slave terminal apparatus isnot detected by said detecting section.
 4. The communication terminalholding apparatus according to claim 3, wherein the control sectioncontrols to make the control right acquiring section and the secondscheduling section intermittently operate when every slave terminalapparatus in the relevant master-slave type network has left the networkor at a state of timeout where there is no response for a predeterminedperiod of time after detecting the slave terminal apparatus by thedetecting section.
 5. The communication terminal holding apparatusaccording to claim 3, wherein the control section controls to make thecontrol right acquiring section and the second scheduling sectionintermittently operate when every slave terminal apparatus in therelated master-slave type network gets into a standby status afterdetecting the slave terminal apparatus by the detecting section.
 6. Thecommunication terminal holding apparatus according to claim 3, whereinthe control section controls to make the control right acquiring sectionand the second scheduling section intermittently operate at a graduallymultiplied cycle of communication frame timing.
 7. The communicationterminal holding apparatus according to claim 1, wherein, when thecommunication terminal holding apparatus does not have the controlright, the control right acquiring section inquires for an apparatusthat has the control right to the network to which the communicationterminal holding apparatus is belonged and specifies the apparatushaving the control right.
 8. The communication terminal holdingapparatus according to claim 1, wherein the control right acquiringsection comprises a list of apparatus having the control right in thenetwork to which the communication terminal holding apparatus isbelonged, and, when the communication terminal holding apparatus doesnot have the control right, retrieves the list and specifies theapparatus having the control right.
 9. The communication terminalholding apparatus according to claim 4, wherein the period of time-outis set in accordance with communication urgency of a slave terminalapparatus.
 10. The communication terminal holding apparatus according toclaim 4, wherein the period of time-out is set in accordance withclassification of communication class of a slave terminal apparatus. 11.A base station apparatus comprising a communication terminal holdingapparatus used for a network in which a direct link type network and amaster-slave type network are integrated with each other, saidcommunication terminal holding apparatus comprising: a control rightacquiring section that specifies an apparatus having control right whenthe communication terminal holding apparatus does not have the controlright, requests a transfer of the control right from the apparatushaving the control right and acquires the control right of said directlink type network; a first scheduling section that assigns communicationresources to a terminal apparatus of said direct link type network afteracquiring the control right; and a second scheduling section thatassigns communication resources to a slave terminal apparatus of saidmaster-slave type network while cooperating with said first schedulingsection so as not to cause any competition or collision of communicationresources.
 12. The communication terminal holding apparatus according toclaim 1, comprising an access point facility in the master-slave typenetwork and a central controller facility and a wireless terminalfacility in the direct link type network.
 13. A communication terminalholding method of communication terminal holding apparatus used in anetwork in which a direct link type network and a master-slave typenetwork are integrated with each other, comprising: specifying anapparatus having control right when the communication terminal holdingapparatus does not have the control right, requesting a transfer of thecontrol right from the apparatus having the control right and acquiringthe control right of communication in the direct link type network;carrying out a first scheduling in which communication resources areassigned to a terminal apparatus in the direct link type network afteracquiring the control right; and carrying out a second scheduling inwhich communication resources are assigned to a terminal apparatus inthe master-slave type network while mediating a communication betweenthe direct link type network and the master-slave type network bycooperating with said first scheduling so as not to cause anycompetition or collision of communication resources.